Frictional gearing.



. JOEL eoMBoRow, or LYNN,

' Nasen-rio.

ssIGNoR' rOfGENERaL ELEc'rnrc coMrANY;

MssA'oriUsEfr'rs, A A ooRPonATIoN. or NEW- Yoan.

To all 'tvzom it 'may concern.: Be it known that I, JOEL GoMBonow, ac itizen of the United States; residing v at Lynn, ="county.- of Essex,

State of Massachusetts, have invented certain new vand the following is a specification.

coupling'sfor connecting two shafts'together so asto cause them to be operated 'at vdifferent relative speeds, 10

4useful. Improvements in Frictional 'Gearings,.of which The present invention rel testo ifiictielrgearing or and :particularly tothose couplings `known as centrator'coup1ings .wherein a`serie's of friction rings bear respectively upon the drivirrg shaft and upon a fixed justments are once madethe ratio; be tween' the speeds track or bearing and impart motion ito the driven' shaftthrough the4 medium of rolls carriedby the driven shaft and projecting into the rings.

In couplings of he* haracter describ'e'dfyafterthe-adf ofthe driving and drivenl shafts remains Constant but it may'happen that it i s desirable to'change this ratioat times,A and the present invention" therefore contem- `plates a novel and simple construction and `arrange-- ment of parts for permitting theratio between the i ,speeds of 'the driving and driven shafts to be altered.' tionwith'the accompanying' drawing.

tion and partly in longitudinal section an4 electric mo#V The present invention-will be more fully understood `vrfrom the following description'thereof takenin cnnecf In said drawing Figurell shows partly side elevator'ha'ving its shaft coupled to .ai driven shaft by mechanism arranged inaccordance withthe present invention; Fig. 2 is a cross-section taken on line 2-2 of Fig..

Referencebeing had to motor armature, 2 the field -ring, and 3 thearmature shaft. The armature shaft is journal'ed' at one 4en'd in a bearing 4 ofthe usual type. The endbearing member -5 -at the opposite side of themotor is displaced axiallyI 4 and supports, linstead of the armature shaft, a shaft 6 which'is adaptedto be coupled-to and driven from the armature shaft. The end bearing member 5 and the field frame may be rigidly held together any suitable the-space between the end bearing member 5 and the.

way, as by means of a base 7 *on which both are mounted and bolts 8` The cen'trator` coupling is arranged within iield and comprises means for connecting the two shafts different relations with each other.l

In the particulararrangement shown there areibut two adjustments, lthoughit isevident that this number may be varied. Thus,l thereare. two centrator.

couplings, each having its own track ring, together with means for rendering either. of the couplings inactive and the other active. o

On the inner end of the shaft 6- there is a spider 9,

Specification of `Letters Patent. maintained member 8.11905. serairazsopsi.

the`- drawing, 1 represents a' 'rings-13 engage with-'anenlarged ,portion 15 ofthe armature shaft, ,while'the-rings 14 engagewith a por-,

tothe arms of whichare secured stub shafts 10 'entend-- ing parallel'A withthe' axisof themachine. On each of the stub shafts-are arranged two rolls l1`and 12 hav-.

ing different diameters. `Surrounding these rolls are' friction rings and 14', respectively. The friction tion of the armature shaftf of less' diameter. j -16 and 17a are the trackrings with'which thefri'ction rings 13 g 'and 14, respectively, coperate. These track rings are of the Aordinary lsplit ringtype, that-is, they are open-ended rings, as indicatedat a in Figs. 2 and 3. Each track ring is provided onits' outer surface with double' in'clines'18 and 19, respectively. One of the' inclines 18 yis adapted to coperatewith a complementary inclineon the endl bearing member 5, and` Vone of the inclinesl in like mannercoperateswith ring. An1intermediatering' 20 is provided on oppo- 'sitey sides with inclined 'faces adapted to cb'peratei respectivelyl with oneof-` the inclines `-011l the 16 and the corresponding .incline onthe ring '17." VBy moving ring 20'1aterallyin'one direction or the other,

one'of; the track rings, depending upon the'dir'ection of movement, will be compressed and the vshaft 6will be'driven through the'fricti'on rings cooperating with this particular ring. Thus, when the 1 ing20 is fmoved to the right, the track le'is compressed andthe friction ring-13 comes into play, while thefriction rings .14 run idle. When the ring 2l) 4 is moved to the left,

track ring 16 is released andtrack Iring' 17 comes in to play, the shaft 16 'being-now driven through'friction rings I4; and the friction rings 13 remaining idle. Any suitable means'may beprovidedfor shifting 'the ring20 and for this purpose 'I have shown a nut 2 1 engaging screwthreads 22 'associated with "the field ring and threads'ZS on the ring 20. By makingionfe.

of the -screw-threads right-handed andthe other lefthanded, the turning of :the nut produces a. lat eral movement of the ring '20. fThenutmaybe rotatedin any desired manner, as by means of a tool vengaging notches 24 larranged about the periphery of the nutf" The track rings`16 and 17 are prevented from 'rotating by set-screws 2 5 and 26, respectively, which engage in I grooves 27 and'28 on the fined framework so astohold .the rings againstrotation at the same time` permittingthem to be compressed and -to move laterally slightly.

It willnow be seen 'that by. the present invention I have -provided means wherebya plurality -of'speed reductions maybe obtained rom'a motor shaft through a simpleand easily performed operation and without removing any of the working parts from their position.

Itis of course understood that-the present invention 70 y' f a complementary incline associated with the vfield l Patent of th' United States, is,-

in vits broader-aspects is not confined to the particular details 'of construction shown on the ,drawing, 'but 'that variouschanges maybe made Without departing from the scope of the present invention. l

What I claim as new, and desire to secure by Letter -1. In combination,` a driving shaft, a driven shaft, a plurality of setsof friction rings revolubly mountedon said driven shaft .for rotation therewith and adapted to with said fric'tlonrings, and an adjusting ring cooperating -vi`th 'said track rings for bringing either track ring into' operative relation with th corresponding friction rings.

` 2. In combination; a' driving shaft, a' driversshaft, u plurality of setsof friction rings revolubly moutedfon said driving shaft for 'rOtatipn'thereWlth and adapted. to .engage with saiddriv'mg shaft', tra'ckri'gs cooperating with said'` friction lngs, andme'a's for simnltanously bringing either of said track ringsinto operative relation with' the correspondln'gfrictio'n rings and releasing the other track ring from coperation with its friction rings.

' 3. In combination, a driving shaft, a driven sha t", two

sets' of friction rings nga-ging with said driving shaft and revoluhiy mounted upon n member fixed to said driven plurality of sets lof friction rings engaging with said driving shaft, means for revolubly supporting said friction engage. with. said, d wlg., smlft "am ring@ prtmg ringsupon a member iixed to and movable with the driven shaft', track rings cooperating with said friction rings, an adjusting ring, said'adjusting `ring and'trark rings having coperatlng inclined faces, and means for simultaneously moving said adjusting ring into operative relation -with either of said track rings and ont of operative relation with the other track ring.

In witness vvhereoi! I have hereunto set my hand this f fth day of December, 1905.

JOEL GOMBoRoWQ l Witnesses: f

JOHN M'cMANUs, Jr?, Hriivnro. WnsrnNnAnP. 

